SPECIES DUBIiE. 373 



zone of growth. Latera lost ; no doubt they were rudi- 

 mentary. 



A fragment of a posterior cirrus, which adhered to one 

 of the valves, shows that each segment supported four 

 pairs of spines. 



Width of the capitulum before disarticulation, probably 

 was about -^th of an inch. 



Species mihi non satis notce, aid dubice. 



Anatifa villosa. Bmgiere. Eucyclop. Meth. Des. Vers., torn, i, 

 1789, p. 62, PL clxvi. 



On ships : Mediterranean. 



Anatifa hirsuta.* Conrad. Journal of the Acad, of Nat. Sc., 

 Philadelphia, vol. vii, 1837, p. 262. 



On fuci, Payal, Azores. 



The specimens, to which these names have been given 

 by the above two authors, are described as small, and the 

 A. villosa was suspected by Brugiere to be young. The 

 A. hirsuta is said by Conrad to have the valves minutely 

 striated, granulated, and covered by a strong hirsute 

 epidermis ; the scuta, compared with the other valves, 

 are very large ; the entire length of this specimen was a 

 quarter of an inch. The A. villosa is described as having 

 smooth valves, and apparently the peduncle alone is 

 hirsute. Now, in young individuals of Lepas australis, 

 the peduncle is hairy, whilst in full-grown specimens it 

 is quite smooth. Again, in some varieties of L.fascicu- 

 laris, the thorax, prosoma, and cirri are hirsute, whereas 

 they are generally quite smooth ; hence I am inclined to 

 suspect that A. villosa is the young, in a state of variation, 



* The Anatifa hirsuta of Quoy and Gaimard is the Ibla quadrivahis of 

 this work. 



